Why not a 300 Weatherby ? They make a lefty with the Peak 44 stock and if you shop around you can find a new one for about $2K.
Or shop Gunbrokers and wood stock rifles can be found for around $1,000-1,400.
New Weatherbys come with a trigger tech trigger and a MOA guarantee. Brass and ammo is easy to find while 300 RUM brass is almost impossible to put your hands on it.
